| 'use strict'; | |
| var has = require('has'); | |
| var assertRecord = require('../helpers/assertRecord'); | |
| var Type = require('./Type'); | |
| // https://www.ecma-international.org/ecma-262/6.0/#sec-isdatadescriptor | |
| module.exports = function IsDataDescriptor(Desc) { | |
| if (typeof Desc === 'undefined') { | |
| return false; | |
| } | |
| assertRecord(Type, 'Property Descriptor', 'Desc', Desc); | |
| if (!has(Desc, '[[Value]]') && !has(Desc, '[[Writable]]')) { | |
| return false; | |
| } | |
| return true; | |
| }; |